.osx: Display Bluetooth icon in menu bar
README: Credit @kevinSuttle
.osx: Set Desktop as the default location for new Finder windows

Closes #285.
Merge commit '674506b7c6c4dfab674650a3eda6bf5c24e1f0e7'

* commit '674506b7c6c4dfab674650a3eda6bf5c24e1f0e7':
  .osx: Set Desktop as the default location for new Finder windows
  .osx: Display Bluetooth icon in menu bar